煤炭与化工2024，Vol.47Issue(3)：11-16,21,7.DOI:10.19286/j.cnki.cci.2024.03.003
工作面回采扰动影响下煤层大巷群围岩控制研究
Research on surrounding rock control of main coal roadway group under the influence of face mining disturbance
摘要
Abstract
Based on the engineering background of the impact of No.N2105 Face in the final stage of mining on the coal roadway group in front of its stop line,on-site measurement and research indicated that the impact of mining disturbance caused varying degrees of damage to the surrounding rock of the coal seam roadway group.Based on this,simulation analysis using UDEC3D discrete element software showed that the vertical stress peak in the coal body could be effectively reduced after the roof above the coal pillar cracks.At the same time,according to the simulation analysis of COMSOL Multiphysics 6.0 simulation software,the optimal grouting pressure and water-cement ratio were 1.0 MPa and 1.5∶1 respectively.During the on-site industrial test stage,the monitoring data of the mine pressure by setting up a measuring station in the 1 # return air roadway showed that the convergence rate of the two sides and top and bottom of the surrounding rock was controlled within 5％,and the overall deformation control effect of the roadway surrounding rock was significant.关键词
采动影响/煤层大巷/顶板致裂/注浆加固/收敛量Key words
mining impact/coal roadway/roof cracking/grouting reinforcement/convergence quantity分类
矿业与冶金引用本文复制引用
张虎..工作面回采扰动影响下煤层大巷群围岩控制研究[J].煤炭与化工,2024,47(3):11-16,21,7.基金项目
国家自然科学基金项目(52104091) （52104091）
国家重点研发计划项目(2020YFB1314002) （2020YFB1314002）
